Migration

(venv) % export FLASK_APP=app.py
* Serving Flask app "app.py"
* Environment: production
WARNING: Do not use the development server in a production environment.
Use a production WSGI server instead.
* Debug mode: off
/home/haminh/PycharmProjects/flask-demo-migration/venv/lib/python3.6/site-packages/flask_sqlalchemy/__init__.py:794: FSADeprecationWarning: SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and will be disabled by default in the future. Set it to True or False to suppress this warning.
'SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and '
* Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)